void LateUpdate()
{
// Manipulate z coord. to sort sprites tr -> bl
Rect bounds = cam.WorldRect().Expand(2f);
float maxZ = cam.farClipPlane * .95f;
float horizontalStride = maxZ / bounds.size.y;
Vec2 position = spriteContainer.position.xy();
Vec2 posNormalized = (position - bounds.min) / bounds.size;
posNormalized = posNormalized.Clamp(0, 1);
float z = posNormalized.y * maxZ + posNormalized.x * horizontalStride;
spriteContainer.position = new Vec3(position.x, position.y, z);
}